Based on an improved multiphase transport (AMPT) model, which gives a good description of proton production with a smooth quark matter to hadronic matter transition in relativistic heavy ion collisions, we study deuteron and triton productions from the coalescence of nucleons at the kinetic freezeout of these collisions. For central $\mathrm{Au}+\mathrm{Au}$ collisions at center-of-mass energies $\sqrt{s_{\text{NN}}}$ from 7.7 GeV to 200 GeV available at the Relativistic Heavy Ion Collider (RHIC), we find that the yield ratio $N_{\text{t}}{N}_{\text{p}}/N_{\text{d}}^2$ of proton, deuteron, and triton is a monotonic function of collision energy. Our study confirms the results from similar studies based on different dynamic model, which have either no phase transition or a crossover transition between the quark-gluon plasma and the hadronic matter, that this yield ratio does not show any nonmonotonic behavior in its collision-energy dependence.

中文翻译：

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相对论重离子碰撞的多相输运模型中的轻核产生

基于改进的多相输运 (AMPT) 模型，该模型很好地描述了相对论重离子碰撞中从夸克物质到强子物质的平滑转变的质子产生，我们研究了在动力学冻结时核子聚结产生的氘和氚。这些碰撞。对于中央$金+金$ 质心能量碰撞 $\sqrt{{秒}_{\text{神经网络}}}$ 从 7.7 GeV 到 200 GeV 可在相对论重离子对撞机 (RHIC) 获得，我们发现屈服比 $N_{\text{吨}}{N}_{\text{磷}}/N_{\text{d}}^2$质子、氘核和氚的原子数是碰撞能量的单调函数。我们的研究证实了基于不同动力学模型的类似研究的结果，这些模型在夸克 - 胶子等离子体和强子物质之间没有相变或交叉跃迁，该屈服比在其碰撞能量方面没有表现出任何非单调行为依赖性。